drm/amdgpu: fix dereference before check

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
This commit is contained in:
Christian König 2015-05-11 14:32:17 +02:00 • committed by Alex Deucher
commit d919ad49ac